Attachment for pneumatic shearing-tools



E. L. HOUSE.

ATTACHMENT FOR PNEUMATIC SHEABING TOOLS.

APPLICATION FILED OCT. 20, I919.

Patented Dec. 14, 1920.

I lwu /wbo'b Edwfird L. Home UNITE-D STA EDWARD L. HOUSE, OF COLUMBUS, OHIO.

ATTACHMENT FOR PNEUMATIC- snnnarne-roots.

To all whom. it may concern:

Be it known that I, EDWARD L. Roman, a citizen of the United States, residing at Golumbus, in the county of Franklin and State :1 of Ohio, have invented certain new and useful Improvements in Attachments for Pneumatic Shearing-Tools, of which the following is a specification.

This invention relates broadly to pneumatic hammers, and has particular refer,- ence to an improved attachment therefor; the primary object of the invention rests in the provision of an improved adjustable tachment for pneumatic hammers which is so formed as to be capable of surrounding a rivet head or other similar article upon which the hammer is operating, whereby in the event of the head being sheared by said hammer, the same or chips will be prevented from flying away from the hammer by being incased by the housing, whereby the llkelihood of injury to surrounding persons or objects will be reduced to a minimum.

With these and other objects in view, as will appear as the description proceeds, the invention accordingly consists in the novel features of construction, combinations of elements and arrangement of parts, hereinafter to be fully described and to have the scope thereof pointed out in the appended claim.

In the accompanying drawing, forming a part of this specification, and in which similar characters of reference denote like and corresponding parts:

Figure l is a side elevation of a pneumatic hammer illustrating the application of the attachment comprising the preferred form of the invention thereto.

Fig. 2 is a top plan view of the attachment.

Fig. 3 is a transverse sectional view taken along the line 33 of Fig. 2.

Fig. 4.- is a detailed perspective view of a slightly modified form of housing for the attachment.

Referring more particularly to the structural details of the present invention, the latter consists of a rivet holding attachment 1, which may be admirably employed in connection with a pneumatic hammer or other power operated tool 2. In the present instance, the hammer is formed to consist of the usual barrel 3 and has its rear end equipped with an operating handle 4. A

Specification of Letters Patent.-

Patented Dec. 14. 1920.

Application filed October 20, 1919. Serial No. 332,049.

shearing tool is carried in the ordinary manner by the barrel 3 and is adapted to be pulsated back and forth by the usual operations of the hammer. ()bviously, by the reciprocation of the shearing tool 5, the latter may be efiiciently employed for removing the heads 6 from rivets or other similar securing devices 7 and it is the common practice to employ tools of this nature for the purpose of removing or shearing the heads 6.

owever, it is obvious that owing to the blow which the tool 5 will deliver to the rivet, the head of the latter when sheared ordinarily flies from the shank of the rivet in a free and uncontrolled manner, and it has been found that such flying of the rivet heads is very likely to cause injury to persons or objects with which they may contact. It is therefore the purpose of the present invention to equip the hammer 2 with attachment l which may be so constructed as to substantially incase the heads 6 and to prevent their flying about after being sheared.

Accordingly, the attachment 1 in its preferred form consists of a resilient extension member 8 which is mounted so as to extend on a plane parallel with that of the barrel 3 and the shearing tool 5 and ordinarily terminates forwardly at a'point in advance of the beveled shearing end of the tool 5. To secure the attachment to the barrel 3, the extension member 8 is provided at or near its rear end with a resilient sleeve 9,

which is so arranged as to be capable of readily slipping on the barrel 3 and owing to its resiliency will grip said barrel in a positive manner so as to efi ect a secure adjustment of the attachment 1 upon the hammer. Fastening elements 10 may be utilized for the purpose of connecting the sleeve 9 with the extension member. Obviously, through the provision of the sleeve 9, the attachment as a whole may be caused to assume any desired position upon the barrel 3 and in this manner the attachment may be readily positioned so as to adapt itself to the angularities which the hammer 2 may assume when being employed.

The forward end of the extension member is equipped with a housing 11. This housing may be of any suitable form and, as shown in Figs. 1 to 3 in the drawings, is of convex formation, so as to provide an interior chamber 12 for the reception of the TES PATENT OFFICE.

rivet head 6, about which the housing; freely ber 12 so that the last cleaving blow of the.

tool 5 will forcibly eject the severed head 6 from the shank of the rivet and, notwithstanding this fact, said head will be prevented from flying in tangential directions by the presence of the housing 11, which latter acts to confine the head within the chamber 12 and to prevent undue and uncontrolled motion on part thereof.

The attachment itself may be readily ap plied upon the hammer 2 and will in no way interfere with the normal or free opera tion of the latter. Frequently in shearing a rivet head, it is necessary to change the angularity of the hammer with respect to the axis of the rivet. However, this shifting of the hammer will in no wise effect a change in position of the housing from its protective location around the head of the rivet, this being due to the fact that the extension member is preferably formed from a resilient material and thus when a change in position of the hammer is effected, the extension member itself may be flexed without interfering with the housing. Also, the lower edges of said housing are preferably cut on a bias to the plane of the extension member and these edges lie substantially parallel with the cooperating beveled edge of the shearing tool 5. By this construction, the housing may be readily adapted to the angularity of the work at hand. It is obvious that the form of the housing shown in the preferred form of the invention is not strictly essential and to demonstrate this, at tention is directed to Fig. 4, wherein the housing is constructed with angularly re lated faces instead of assuming the convex form disclosed in Figs. 1 to 3. Both forms will operate under given conditions with equal facility, and, if desired, the housing 11 may be detachably connected with the forward end of the extension member 8 so that housing of different formation may be igeadily connected with said extension mem- From the foregoing description taken in connection with the accompanying drawing, it will be apparent to those versed in the art that the present invention provides means for reducing accidents which are directly caused by the flying or uncontrolled motion of sheared rivet heads. Moreover, by use of the attachment an operator is enabled to work much faster and with greater freedom, inasmuchas he is not limited or hampered in his movements by the liability of guiding the probable pathwhich the heads may follow or by stopping the operationof the tool until conditions permit of its use. This factor of increased efiiciency in operation is one of the outstanding features of the present invention. In conclusion, it will be observed that the attachment may be readily applied in, its operative position upon the hammer the extension member 8, said attachment will. offer no impediment to the successful and rapid operation of the hammer upon which it is'carried.

What is claimed is:

An attachment for pneumatic shearing tools comprising a resilient sleeve capable of detachably engaging the forward portion of the body of a shearing tool, an extension carried by said sleeve and arranged to project to one side and in parallelism with the movable shearing blade of said tool, and a housing carried by the outer end of said extension and arranged to substantially incase the work to be operated upon by said blade,

In testimony whereof I affix my signature.

EDWARD L. HOUSE.

2 and by'the resiliency of- 

